Foaming alcohol compositions with selected dimethicone surfactants

ABSTRACT

Foaming alcohol compositions with selected dimethicone surfactants are disclosed. The dimethicone surfactants are PEG-8 to PEG-12 linear dimethicone surfactants and in particular PEG-10 linear dimethicone surfactant. The compositions are useful as antimicrobial products and in particular handcare or skincare products.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a Continuation application of U.S. Ser. No.13/926,051 filed Jun. 25, 2013, which is a Continuation application ofU.S. Ser. No. 13/742,996 filed Jan. 16, 2013, now U.S. Pat. No.8,530,524 issued on Sep. 10, 2013, which is a Continuation applicationof U.S. Ser. No. 13/223,419 filed Sep. 1, 2011, now U.S. Pat. No.8,383,686 issued on Feb. 26, 2013, which is a Continuation applicationof U.S. Ser. No. 12/787,624, filed May 26, 2010, now U.S. Pat. No.8,058,315 issued on Nov. 15, 2011, which is a Continuation of U.S. Ser.No. 12/179,382 filed Jul. 24, 2008, now U.S. Pat. No. 7,842,725, issuedNov. 30, 2010, herein incorporated by reference in their entirety.

FIELD OF THE INVENTION

Foaming alcohol compositions with selected dimethicone surfactants aredisclosed. The dimethicone surfactants are PEG-8 to PEG-12 lineardimethicone surfactants and in particular PEG-10 linear dimethiconesurfactant. The compositions are useful as antimicrobial products and inparticular handcare or skincare products.

BACKGROUND

Alcohol compositions are desirable hand and skincare products. They areeffective against a wide range of microorganisms such as gram positiveand gram negative bacteria and fungi. And they are able to killmicroorganisms faster than other antimicrobial products. Alcoholantimicrobial products are available as water thin liquids, gels,emulsions, and aerosol foams. Commercially available aerosol alcoholfoams, such as QUIKCARE™, commercially available from Ecolab Inc. (St.Paul, Minn.) rely on propellants to generate the foam. Propellants areneeded because the surface tension of alcohol is too low for mostsurfactants to be able to generate foam and sustain it at atmosphericpressure. But, aerosol products are less desirable because of theirinherent drawbacks of not being able to visually monitor the productcontents in the container, the additional packaging complexity, andcost. It is desirable to move away from aerosol cans and aerosolpropellants to less complex packaging and chemistry that allows acustomer to see the product contents in the container while maintainingthe aesthetic benefits of a foaming product. It is against thisbackground that the present invention has been made.

SUMMARY

Surprisingly, it has been discovered that PEG-8 to PEG-12 lineardimethicone surfactants and in particular PEG-10 linear dimethiconesurfactant are especially effective at generating foam in alcoholproducts at atmospheric pressure in transparent or translucent,non-aerosol packaging. The PEG-8 to PEG-12 linear dimethiconesurfactants are more effective than dimethicone surfactants with thesame PEG chain length but a different polymer architecture.

In some embodiments, the invention relates to a non-aerosolantimicrobial composition with a PEG-8 to PEG-12 linear dimethiconesurfactant, an alcohol, and water, where the dimethicone can generate anaverage foam height of greater than 20 mm without needing more than 5%of additional surfactant. In some embodiments, the invention relates toa non-aerosol antimicrobial composition with a PEG-10 linear dimethiconesurfactant, an alcohol, and water, where the dimethicone can generate anaverage foam height of greater than 20 mm without needing more than 5%of additional surfactant. In some embodiments, the composition alsocontains additional materials such as skin conditioners, terpenoids,chelating agents, and preservatives.

These and other embodiments will be apparent to those of skill in theart and others in view of the following detailed description of someembodiments. It should be understood, however, that this summary, andthe detailed description illustrate only some examples of variousembodiments, and are not intended to be limiting to the invention asclaimed.

DETAILED DESCRIPTION OF SOME EMBODIMENTS

As discussed above, the invention generally relates to foaming alcoholcompositions with PEG-8 to PEG-12 linear dimethicone surfactants and inparticular PEG-10 linear dimethicone surfactant. The compositions areuseful as antimicrobial products and in particular handcare or skincareproducts.

PEG-8 to PEG-12 Linear Dimethicone Surfactants

Surprisingly, it has been discovered that PEG-8 to PEG-12 lineardimethicone surfactants, and in particular PEG-10 linear dimethiconesurfactant, are more effective at generating and stabilizing foam inalcohol compositions than dimethicone surfactants with the same PEGchain length but a different polymer architecture.

More particularly it has been discovered that linear block copolymers ofPEG with polydimethylsiloxane (specifically with INCI names of PEG-8dimethicone, PEG-10 dimethicone, and PEG-12 dimethicone) can produce asufficient foam height to be used as the primary foaming component of anon-aerosol foaming alcohol compositions, which is not the case forcopolymers with the same INCI names but different polymer architectures.For example, polymers with pendant PEG groups or other highly branchedpolymer structures, will not produce sufficient foam to be used as aprimary foaming surfactant. In the case of PEG dimethicone copolymers,linear block copolymers refer to when polyethylene glycol chain unitsare attached to the terminal ends of the linear polydimethylsiloxanebackbone:

where R═CH₃ or CH₂CH₃, m=4-20 on average, y=1-5 and n=8-12 on average.

Pendant copolymers refer to linear polydimethylsiloxane polymers withPEG groups attached along the polydimethylsiloxane backbone and may ormay not be attached to the terminal chain ends of thepolydimethylsiloxane. Such pendant copolymers are often referred to ashaving a comb or comb-like structure such as:

where R is independently=CH₃, CH₂CH₃, or an ethoxylated alkyl chain (forexample CH₂CH₂CH₂O(CH₂CH₂O)_(n)H) attached directly to the silicone endgroup and a=a repeating silicone group.

Some examples of commercially available PEG-8 to PEG-12 lineardimethicone surfactants include Silsoft 810 (PEG-8) and Silsoft 870(PEG-12) from Momentive Performance Materials, and Silsurf DI-1010(PEG-10) from Siltech. In some embodiments, the dimethicone surfactantis preferably a PEG-10 linear dimethicone surfactant.

The dimethicone surfactant can be present in the alcohol compositionfrom about 0.5 to about 10 wt. %, from about 1.0 to about 7 wt. % andfrom about 2 to about 5 wt. %.

Alcohol

In addition to water, the composition includes an alcohol. The alcoholis preferably a lower chain alcohol such as a C₂-C₄ alcohol. Examples ofsuitable alcohols include ethanol, propanols, such as isopropanol andn-propanol, and butanols. The alcohol is preferably ethanol.

The composition may contain one alcohol, or a mixture of two or morealcohols. The alcohol is preferably present in the composition in anamount of active alcohol from about 50 to about 90 wt. %, from about 54to about 85 wt. %, and from about 60 to about 80 wt. %.

Skin Conditioner

The composition may optionally include at least one skin conditionersuch as an emollient, humectant, occlusive agent, or other moisturizerto provide moisturization, skin softening, skin barrier maintenance,anti-irritation, or other skin health benefits. Some non-limitingexamples of emollients include alkyl benzoate, myristyl myristate, cetylmyristate, glyceryl dioleate, methyl laurate, PPG-9 laurate, lauryllacylate allantoin, octyl palmitate, lanolin, propylene glycol,butylenes glycol, ethylene glycol monobutyl ether, glycerine, fattyacids, natural oils such as almond, mineral, canola, sesame, soybean,wheat germ, corn, peanut and olive oil, isopropyl myristate, myristylalcohol, aloe vera, hydrolyzed silk protein, Vitamin E, stearyl alcohol,isopropyl palmitate, sorbitol, amino acid complexes, hydrolyzed plantproteins, and polyethylene glycol. Some non-limiting examples ofhumectants include hydroxyethyl urea, agarose, urea, sodium PCA,arginine PCA, fructose, glucose, glutamic acid, glycerine, honey,lactose, maltose, polyethylene glycol, sorbitol and mixtures thereof.Some non-limiting examples of occlusive agents include petrolatum, sheabutter, avocado oil, balm mint oil, cod liver oil, mineral oil,trimyristin, stearyl stearate, synthetic wax, or mixtures thereof. Somenon-limiting examples of other moisturizers include ethyl hexylglycerin,cholesterol, cystine, hyaluronic acid, keratin, lecithin, egg yolk,glycine, PPG-12, polyquaternium polymers such as polyquaternium-11,benentrimonium chloride, dihydroxypropyl PEG-5 linoleammonium chloride,glycerol oleate, PEG-7 glyceryl cocoate, cocoglucoside, PEG-200hydrogenated glyceryl palmate, panthenol, retinol, salicylic acid,vegetable oil, methyl gluceth-10, methyl gluceth-20, ethoxylatedderivatives of skin conditioners such as glycereth-26 and ethoxylatedshea butter, and mixtures thereof. Finally, some non-limiting examplesof anti-irritants include bisabolol and panthenol.

A person skilled in the art will recognize the different strengths ofdifferent skin conditioners and formulate accordingly. In someembodiments, the skin conditioner is preferably present in thecomposition in an amount from about 0.01 to about 20 wt. %, from about0.05 to about 15 wt. %, and from about 0.1 to about 10 wt. %.

Terpenoid

The composition may optionally include a terpenoid. Terpenoids aredefined as materials with molecular structures containing carbonbackbones made up of isoprene (2-methylbuta-1,3-diene) units. Isoprenecontains five carbon atoms and therefore, the number of carbon atoms inany terpenoid is a multiple of five. It is believed that terpenoidsassist in promoting the uptake of antimicrobial compounds andpreservatives by cells of bacteria and fungi, thereby increasing theefficacy of the antimicrobial compound or preservative. See U.S. Pat.No. 6,319,958 and DE 195 23 320 which are incorporated by reference intheir entirety. Some non-limiting examples of terpenoids includeα-terpinene, cineole, citral, citronellal, citronellol, farnesol,geraniol, limonene, linalool, methone, nerolidol, terpineol, camphene,menthone, myrcene, nerol, tetrayhydrogeraniol, tetrahydrolinalool,apritone, and bisabolol. The terpenoid is preferably farnesol,nerolidol, bisabolol, or apritone.

The terpenoid is preferably present in the composition in an amount fromabout 0.005 to about 5 wt. %, from about 0.05 to about 2.5 wt. %, andfrom about 0.1 to about 1.5 wt. %.

Chelating Agent

The composition may optionally include a chelating agent. Examples ofchelating agents include phosphonic acid and phosphonates, phosphates,aminocarboxylates and their derivatives, pyrophosphates, ethylenediamineand ethylenetriamine derivatives, hydroxyacids, and mono-, di-, andtri-carboxylates and their corresponding acids. Other chelating agentsinclude nitroloacetates and their derivatives, and mixtures thereof.Examples of aminocarboxylates include amino acetates and salts thereof.Suitable amino acetates include: N-hydroxyethylaminodiacetic acid;hydroxyethylenediaminetetraacetic acid; nitrilotriacetic acid (NTA);ethylenediaminetetraacetic acid (EDTA);N-hydroxyethyl-ethylenediaminetriacetic acid (HEDTA); tetrasodiumethylenediaminetetraacetic acid (EDTA); diethylenetriaminepentaaceticacid (DTPA); and alanine-N,N-diacetic acid; n-hydroxyethyliminodiaceticacid; and the like; their alkali metal salts; and mixtures thereof.Suitable aminophosphates include nitrilotrismethylene phosphates andother aminophosphates with alkyl or alkaline groups with less than 8carbon atoms. Exemplary polycarboxylates iminodisuccinic acids (IDS),sodium polyacrylates, citric acid, gluconic acid, oxalic acid, saltsthereof, mixtures thereof, and the like. Additional polycarboxylatesinclude citric or citrate-type chelating agents, polymericpolycarboxylate, and acrylic or polyacrylic acid-type chelating agents.Additional chelating agents include polyaspartic acid or co-condensatesof aspartic acid with other amino acids, C₄-C₂₅-mono-or-dicarboxylicacids and C₄-C₂₅-mono-or-diamines. Exemplary polymeric polycarboxylatesinclude polyacrylic acid, maleic/olefin copolymer, acrylic/maleiccopolymer, polymethacrylic acid, acrylic acid-methacrylic acidcopolymers, hydrolyzed polyacrylamide, hydrolyzed polymethacrylamide,hydrolyzed polyamide-methacrylamide copolymers, hydrolyzedpolyacrylonitrile, hydrolyzed polymethacrylonitrile, hydrolyzedacrylonitrile-methacrylonitrile copolymers, and the like.

The chelating agent may be present in an amount from about 0.01 to about5 wt. %, from about 0.05 to about 3 wt. %, and from about 0.1 to about1.5 wt. %.

Preservatives

The composition may optionally include a preservative. Generally,preservatives fall into specific classes including phenolics, halogencompounds, quaternary ammonium compounds, metal derivatives, amines,alkanolamines, nitro derivatives, biguanides, analides, organosulfur andsulfur-nitrogen compounds, alkyl parabens, and miscellaneous compounds.Some non-limiting examples of phenolic antimicrobial agents includepentachlorophenol, orthophenylphenol, chloroxylenol, p-chloro-m-cresol,p-chlorophenol, chlorothymol, m-cresol, o-cresol, p-cresol, isopropylcresols, mixed cresols, phenoxyethanol, phenoxyethylparaben,phenoxyisopropanol, phenyl paraben, resorcinol, and derivatives thereof.Some non-limiting examples of halogen compounds include trichlorohydroxydiphenyl ether (Triclosan), sodium trichloroisocyanurate, sodiumdichloroisocyanurate, iodine-poly(vinylpyrolidin-onen) complexes, andbromine compounds such as 2-bromo-2-nitropropane-1,3-diol, andderivatives thereof. Some non-limiting examples of quaternary ammoniumcompounds include benzalkonium chloride, benzethonium chloride,behentrimonium chloride, cetrimonium chloride, and derivatives thereof.Some non-limiting examples of amines and nitro containing compoundsinclude hexahydro-1,3,5-tris(2-hydroxyethyl)-s-triazine,dithiocarbamates such as sodium dimethyldithiocarbamate, and derivativesthereof. Some non-limiting examples of biguanides includepolyaminopropyl biguanide and chlorhexidine gluconate. Some non-limitingexamples of alkyl parabens include methyl, ethyl, propyl and butylparabens.

The preservative is preferably present in the composition in an amountfrom about 0 to about 3 wt. %, from about 0.1 to about 2 wt. %, and fromabout 0.2 to about 1 wt. %.

Thickener

The composition may optionally include a thickener. Exemplary thickenersinclude (1) cellulosic thickeners and their derivatives, (2) naturalgums, (3) starches, (4) stearates, and (5) fatty acid alcohols. Somenon-limiting examples of cellulosic thickeners include carboxymethylhydroxyethylcellulose, cellulose, hydroxybutyl methylcellulose,hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropyl methylcellulose, methylcellulose, microcrystalline cellulose, sodium cellulosesulfate, and the like. Some non-limiting examples of natural gumsinclude acacia, calcium carrageenan, guar, gelatin, guar gum,hydroxypropyl guar, karaya gum, kelp, locust bean gum, pectin, sodiumcarrageenan, tragacanth gum, xanthan gum, and the like. Somenon-limiting examples of starches include oat flour, potato starch,wheat flour, wheat starch, and the like. Some non-limiting examples ofstearates include PEG-150 distearate, methoxy PEG-22/dodecyl glycolcopolymer, and the like. Some non-limiting examples of fatty acidalcohols include caprylic alcohol, cetearyl alcohol, lauryl alcohol,oleyl alcohol, palm kernel alcohol, and the like.

The amount of thickener in the composition depends on the desiredviscosity of the composition. The composition preferably has a viscositylow enough to pump through a foamer such as an Airspray foamer and allowfoaming.

Additional Functional Ingredients

Additional functional ingredients may be used to improve theeffectiveness of the composition. Some non-limiting examples of suchadditional functional ingredients include skin feel improvers,antioxidants, fragrances, dyes, and mixtures thereof.

Skin Feel Improver

The composition may optionally include a skin feel improver forenhancing the “feel” of the composition on a user's skin or hands. Forexample, it may be undesirable for a composition to have a scaly orgritty texture when applied to a user's skin or after the multipleapplications of the composition. Some non-limiting examples of skin feelimprovers include silicone copolymers such as amodimethicone,cyclomethicone, bis-PEG/PPG-20/20 dimethicone, andstearoxytrimethylsilane, naturally occurring or synthetic fatty acidesters or ethers, and polyalkylene glycols.

If a skin feel improver is included, it is preferably present in thecomposition in an amount from about 0.001 to about 5 wt. %, from about0.01 to about 3 wt. %, and from about 0.1 to about 2 wt. %.

Antioxidant

The composition may optionally include an antioxidant for improved skincondition through the removal of free radicals, and improved productstability. Some non-limiting examples of antioxidants include retinoland retinol derivatives, ascorbic acid and ascorbic acid derivatives,BHA, BHT, betacarotene, cysteine, erythorbic acid, hydroquinone,tocopherol and tocopherol derivatives, and the like.

If an antioxidant is included, it is preferably present in thecomposition in an amount from about 0.001 to about 2 wt. %, from about0.01 to about 1 wt. %, and from about 0.05 to about 0.5 wt. %.

Fragrance

The composition may optionally include a fragrance. Examples of possiblefragrances include natural oils or naturally derived materials, andsynthetic fragrances such as hydrocarbons, alcohols, aldehydes, ketones,esters, lactones, ethers, nitriles, and polyfunctionals. Non-limitingexamples of natural oils include the following: basil (Ocimum basilicum)oil, bay (Pimento acris) oil, bee balm (Monarda didyma) oil, bergamot(Citrus aurantium bergamia) oil, cardamom (Elettaria cardamomum) oil,cedarwood (Cedrus atlantica) oil, chamomile (Anthemis nobilis) oil,cinnamon (Cinnamomum cassia) oil, citronella (Cymbopogon nardus) oil,clary (Salvia sclarea) oil, clove (Eugenia caryophyllus) oil, cloveleaf(Eufenia caryophyllus) oil, Cyperus esculentus oil, cypress (Cupressussempervirens) oil, Eucalyptus citriodora oil, geranium maculatum oil,ginger (Zingiber officinale) oil, grapefruit (Citrus grandis) oil, hazel(Corylus avellana) nut oil, jasmine (Jasminum officinale) oil, Juniperuscommunis oil, Juniperus oxycedrus tar, Juniperus virginiana oil, kiwi(Actinidia chinensis) water, lavandin (Lavandula hybrida) oil, lavender(Lavandula angustifolia) oil, lavender (Lavandula angustifolia) water,lemon (Citrus medica limonum) oil, lemongrass (Cymbopogon schoenanthus)oil, lime (Citrus aurantifolia) oil, linden (Tilia cordata) oil, linden(Tilia cordata) water, mandarin orange (Citrus nobilis) oil, nutmeg(Myristica fragrans) oil, orange (Citrus aurantium dulcis) flower oil,orange (Citrus aurantium dulcis) oil, orange (Citrus aurantium dulcis)water, patchouli (Pogostemon cablin) oil, peppermint (Menthe piperita)oil, peppermint (Menthe peperita) water, rosemary (Rosmarinusofficinalis) oil, rose oil, rose (Rosa damascena) extract, rose (Rosamultiflora) extract, rosewood (Aniba rosaeodora) extract, sage (Salviaofficinalis) oil, sandalwood (Santalum album) oil, spearmint (Mentheviridis) oil, tea tree (Melaleuca alternifolia) oil, and ylang ylang(Cananga odorata) oil. Some non-limiting examples of synthetichydrocarbon fragrances include caryophyllene, β-farnesene, limonene,α-pinene, and β-pinene. Some non-limiting examples of synthetic alcoholfragrances include bacdanol, citronellol, linalool, phenethyl alcohol,and α-terpineol (R═H). Some non-limiting examples of synthetic aldehydefragrances include 2-methyl undecanal, citral, hexyl cinnamic aldehyde,isocycolcitral, lilial, and 10-undecenal. Some non-limiting examples ofsynthetic ketone fragrances include cashmeran, α-ionone, isocyclemone E,koavone, muscone, and tonalide. Some non-limiting examples of synetheticester fragrances include benzyl acetate, 4-t-butylcyclohexyl acetate(cis and trans), cedryl acetate, cyclacet, isobornyl acetate, andα-terpinyl acetate (R=acetyl). Some non-limiting examples of syntheticlactone fragrances include coumarin, jasmine lactone, muskalactone, andpeach aldehyde. Some non-limiting examples of synthetic ether fragrancesinclude ambroxan, anther, and galaxolide. Some non-limiting examples ofsynthetic nitrile fragrances include cinnamonitrile and gernonitrile.Finally, some non-limiting examples of synthetic polyfunctionalfragrances include amyl salicylate, isoeugenol, hedione, heliotropine,lyral, and vanillin.

The composition may include a mixture of fragrances including a mixtureof natural and synthetic fragrances. The fragrance can be present in acomposition in an amount up to about 5 wt. %, preferably from about 0.01to about 3 wt. %, from about 0.05 to about 1 wt. %, and from about 0.1to about 0.2 wt. %.

Dye

The composition may optionally include a dye. Examples of dyes includeany water soluble or product soluble dye, any FD&C or D&C approved dye.The dye can be present in an amount up to about 0.5 wt. %, preferablyfrom about 0.00001 to about 0.1 wt. %, from about 0.0001 to about 0.01wt. %, and from about 0.0001 to about 0.0005 wt. %.

Compositions

The non-aerosol alcohol compositions are especially useful as hand andskincare compositions for reducing microorganisms on the target surface.

In some embodiments, the composition includes less than about 10%, lessthan about 5% or less than about 1% any additional surfactant. The useof additional surfactant may be limited because the selected dimethiconesurfactants are capable of producing and maintaining foam withoutneeding help from additional surfactants.

In some embodiments, the composition includes less than about 10%, lessthan about 5% or less than about 1% any additional silicone materialsbesides the PEG-8, PEG-10, or PEG-12 linear dimethicone surfactant.

In some embodiments, the composition includes less than about 10%, lessthan about 5% or less than about 1% any foam stabilizers.

In some embodiments, the composition may be free or substantially freeof additional surfactant, additional silicone material, or foamstabilizer. In some embodiments, the composition may be free orsubstantially free of a fluorosurfactant.

The composition may be provided as a water thin liquid, structuredliquid or emulsion. The composition is preferably provided as a ready touse composition, meaning that the composition is provided in a way thatcan be applied without needing to dilute it first.

Packaging and Dispensers

The composition may be provided in various packaging sizes. Examples ofpackaging sizes include 1.5 oz, 500 ml and 1 liter bottles. The selectedpackaging preferably has a pump head foamer. Examples of commerciallyavailable pump head foamers include the F2 foamer from Rexam PLC(London, England, formerly Airspray), and the RF-17 Palm Foamer fromRieke Corporation (Auburn, Indiana).

Definitions

For the following defined terms, these definitions shall be applied,unless a different definition is given in the claims or elsewhere inthis specification.

All numeric values are herein assumed to be modified by the term“about,” whether or not explicitly indicated. The term “about” generallyrefers to a range of numbers that one of skill in the art would considerequivalent to the recited value (i.e., having the same function orresult). In many instances, the term “about” may include numbers thatare rounded to the nearest significant figure.

Weight percent, percent by weight, % by weight, wt %, and the like aresynonyms that refer to the concentration of a substance as the weight ofthat substance divided by the weight of the composition and multipliedby 100.

The recitation of numerical ranges by endpoints includes all numberssubsumed within that range (e.g. 1 to 5 includes 1, 1.5, 2, 2.75, 3,3.80, 4 and 5).

As used in this specification and the appended claims, the singularforms “a,” “an,” and “the” include plural referents unless the contentclearly dictates otherwise. Thus, for example, reference to acomposition containing “a compound” includes a mixture of two or morecompounds. As used in this specification and the appended claims, theterm “or” is generally employed in its sense including “and/or” unlessthe content clearly dictates otherwise.

For a more complete understanding of the invention, the followingexamples are given to illustrate some embodiment. These examples andexperiments are to be understood as illustrative and not limiting. Allparts are by weight, except where it is contrarily indicated.

EXAMPLES Example 1 Silicone Surfactant Screening

Example 1 shows various silicone surfactants and their ability togenerate a stable foam. The foaming ability of the silicone surfactantswas evaluated using the following foam height screening procedure.

-   Stock Solution Preparation: A solution consisting of 75.6% Ethanol    SDA 40B (190 proof, 99.5% Active) and 24.4% water was prepared.-   Sample Preparation: To a 20 mL vial, approximately 0.35 g of    silicone surfactant and 9.65 g Stock solution were weighed. The    solution was then mixed until a homogeneous solution was achieved.-   Foam Height Screening: To screen the foam height of each solution, a    small portion (˜1 mL) of the prepared solution was placed into a 2    oz bottle with an Airspray foaming pump head, rinsed around, and    discarded. After the rinsing of the bottle, the remaining contents    of the sample preparation were then transferred into the 2 oz bottle    with an Airspray foaming pump head. The foaming pump head was primed    until liquid or foam was generated through the foamer head. Up to    three additional pumps were performed to ensure that the initial    solution had been evacuated through the pump. After priming the    pump, three additional pumps were performed, directing the material    into a 20 mL glass vial. The height of the foam above the liquid    line was immediately measured in millimeters using a ruler. The    process was repeated one additional time and the two foam height    measurements were averaged. The results are shown in Table 1.

TABLE 1 Silicone Surfactant Screening chemistry type/ Avg. FoamManufacturer Name INCI Name structure Height (mm) Noveon Silsense CA2dimethicone PEG-7 pendant 9.5 succinate Noveon Silsense Q Plus siliconequaternium-8 pendant 10.5 Noveon Silsense Copolyol 7 PEG-33 and PEG-14and pendant 9 PEG-8 dimethicone Noveon Silsense Copolyol 1 PEG-33 andPEG-8 pendant 8.5 dimethicone and PEG-14 Siltech Silube CS-1 PEG-7pendant 6.5 dimethiconesuccinate Siltech Silphos A-100 siliconepolyether pendant 5 phosphate esters* Siltech Silsurf B-208 PEG-8dimethicone pendant 5 Siltech Silsurf A-208 PEG-8 dimethicone pendant5.5 Siltech Silsurf Di-1010 PEG-10 dimethicone linear 25 Siltech SilsurfD212-CG PEG-12 dimethicone pendant 9 Siltech Silquat AD siliconequaternium-8 pendant 4 Siltech Silquat J208-1B PEG-8 disteramoniumpendant 8 chloride PG-dimethicone Degussa EM 97 bis-PEG/PPG-14/14 alpha,omega 11.5 dimethicone, omega- cyclopentasiloxane polyethersiloxanelinear Degussa 85 bis-PEG/PPG-16/16 with the addition 15 PEG/PPG-16/16of caprylic/capric dimethicone, acid triglyceride caprylic/capric,linear triglyceride Degussa B 8852 PEG/PPG-4/12 pendant dimethiconeDegussa B 8832 bis-PEG/PPG-20/20 linear 18 dimethicone Grant IndustriesGransurf 71 PEG-11 methyl ether pendant 9 dimethicone Grant IndustriesGransurf 77 PEG-10 dimethicone pendant 8 Waker Waker-Belsil DMCPEG/PPG-25/25 pendant 8 6031 dimethicone Waker Waker-Belsil DMC bis-PEG15 methyl ether methyl ether 3 6038 dimethicone endcapped linear WakerDMC3071VP cetyl PEG/PPG-15/15 pendant 5 butyl ether dimethicone ShinEtsu KF-6100 polyglyceryl-3 disiloxane pendant 0 dimethicone Shin EtsuKF-6017 PEG-10 dimethicone pendant 12 Shin Etsu KF-6104 polyglyceryl-3pendant 0 polydimethylsixethyl diemethicone Shin Etsu KF-6028 PEG-9pendant 8 polydimethylsiloxane ethyl dimethicone Shin Etsu KF-6015 PEG-3dimethicone 0 Shin Etsu KF-6013 PEG-9 dimethicone pendant 15.5 GESilicone Nuwet 300 aminomodified silicone- pendant 11 polyethercopolymer* GE Silicone L-7657 PEG dimethicone* pendant 9 GE SiliconeSilsoft A424 dimethicone bisamino pendant 0 conditionerhydroxyethyldihydropropyl copolyol/TEA stearate GE Silicone L-7001siloxane pendant 5 polyalkyleneoxide copolymer GE Silicone Silsoft 430PEG/PPG 20/23 pendant 18 dimethicone dimethicone copolyol MomentiveSilsoft 805 PEG-8 dimethicone pendant 17 GE Silicone Silsoft 840 PEG-8dimethicone pendant 7.5 GE Silicone Silsoft 810 PEG-8 dimethicone linear23.5 Momentive Silsoft 870 PEG-12 dimethicone linear 24.5 GE SiliconeSilsoft 875 PEG-12 dimethicone pendant 9 GE Silicone Silsoft 895 PEG-17dimethicone pendant 9.5 Momentive Silsoft 900 PPG-12 dimethicone pendant16.5 Momentive 1188 01P dimethicone copolyol pendant 10.5 Momentive 128801P dimethicone copolyol pendant 13 Rita Ritasil SP100S PEG-12dimethicone pendant 17 Rita Ritasil SW3050 cetyl PEG-PPG 10/1 pendant 0dimethicone Clariant Silcare Silicone trideceth-9 PG pendant 1 SEAamodimethicone (and) trideceth-12 Biosil Biosil Basics SPQ siliconequaternium-2 pendant 3.5 panthenol succinate Biosil Biosil Basics DL-dmethiconol pnthenol pendant 0 30 Biosil Bioplex Cetyl Sil S cetyltriethylmonium pendant 4 dimethicone PEG-8 succinate Pheonix DCF-12PEG-12 dimethicone pendant 6 chemical *no INCI name has been given forthe polymersTable 1 shows that only the linear dimethicones are able to produce afoam height greater than 20 mm. Exemplary dimethicone surfactants inTable 1 with a foam height of greater than 20 mm include Silsurf DI-1010from Siltech, Silsoft 810 from GE Silicone, and Silsoft 870 fromMomentive.

Example 2 Foam Height vs. Silicone Surfactant Concentration

Example 2 determined the effect of dimethicone surfactant concentrationon the foam height. For this example, the foam height was measured usingthe following test:

-   Stock Solution Preparation: A solution was prepared with the    following formula:

Stock Solution (g) Ethanol SDA 40 B (190 Proof, 99.5% Active) 811.11Farnesol 2.78 Bisabolol 1.11 Ethylhexyl glycerin 3.33 Water 181.67The following amounts were added to 60 mL jars. The silicone surfactantsused were Silsurf DI-1010, Silsoft 810, and Silsoft 870.

-   Sample Preparation: To a 60 mL jar,

Sample 1 2 3 4 5 6 7 Stock solution (g) 22.500 45.00 45.00 45.00 45.0045.00 45.00 Silicone 0.125 0.50 1.00 1.50 1.75 2.50 5.00 surfactant (g)Silicone 0.5 1 2 3 3.5 5 10 surfactant (wt. %) Water (g) 2.375 4.50 4.003.50 1.25 2.50 0.00

-   Foam Height Screening: To screen the foam height of each solution, a    small portion (˜1 mL) of the prepared solution was used to rinse a 2    oz bottle with an Airspray foaming pump head and discarded. After    rinsing the bottle, the remaining contents of the sample preparation    were then transferred into the 2 oz bottle with an Airspray foaming    pump head. The foaming pump head was primed until liquid or foam was    generated through the foamer head. Up to three additional pumps were    performed to ensure that the rinse solution had been evacuated    through the pump. After priming the pump, three additional pumps    were performed, directing the material into a 20 mL glass vial. The    height of the foam above the liquid line was immediately measured in    millimeters using a ruler. The process was repeated and the two foam    height measurements were averaged. The results are shown in Table 2.

TABLE 2 Foam Height (mm) Sample 1 2 3 4 5 6 7 Silsoft 810 12 11.5 20 2425.5 26 26 Silsurf DI-1010 14.5 22.5 23.5 24 25 26 26.5 Silsoft 870 1317 23.5 25.5 26 26 27Table 2 shows that 0.5-1 gram of silicone surfactant (samples 2 and 3)is preferred in order to generate 20 mm of foam.

The foregoing summary, detailed description, and examples provide asound basis for understanding the invention, and some specific exampleembodiments of the invention. Since the invention can comprise a varietyof embodiments, the above information is not intended to be limiting.The invention resides in the claims.

What is claimed is:
 1. A handcare/skincare product comprising: a) afoaming agent comprising a PEG-8 linear dimethicone surfactant; b) a C₂to C₄ alcohol; c) a skin conditioner; and d) water; wherein said productis a non-aerosol foaming antimicrobial product.
 2. The handcare/skincareproduct of claim 1 wherein said C₂ to C₄ alcohol is in an amount of fromabout 50 wt. % to about 90 wt. % of said composition.
 3. Thehandcare/skincare product of claim 1, further comprising from about 0.01to about 20 wt. % of a skin conditioner.
 4. The handcare/skincareproduct of claim 1, wherein the composition is free of an additionalsurfactant.
 5. The handcare/skincare product of claim 1, furthercomprising from about 0.005 to about 5 wt. % of a terpenoid.
 6. Thehandcare/skincare product of claim 4, wherein said skin conditioner isselected from the group consisting of ethylhexylglycerin,hydroxyethylurea, urea, panthenol, glycerin, isopropyl myristate,propylene glycol, tocopheryl acetate, polyquaternium-11 and mixturesthereof.
 7. A handcare/skincare product comprising comprising: a) afoaming agent comprising a PEG-10 linear dimethicone surfactant; b) a C₂to C₄ alcohol; c) a skin conditioner; and c) water; wherein said productis a non-aerosol foaming antimicrobial product.
 8. The handcare/skincareproduct of claim 7 wherein said C₂ to C₄ alcohol is in an amount of fromabout 50 wt. % to about 90 wt. % of said composition.
 9. Thehandcare/skincare product of claim 7, further comprising from about 0.01to about 20 wt. % of a skin conditioner.
 10. The handcare/skincareproduct of claim 7, wherein the composition is free of an additionalsurfactant.
 11. The handcare/skincare product of claim 7, furthercomprising from about 0.005 to about 5 wt. % of a terpenoid.
 12. Thehandcare/skincare product of claim 11, wherein said skin conditioner isselected from the group consisting of ethylhexylglycerin,hydroxyethylurea, urea, panthenol, glycerin, isopropyl myristate,propylene glycol, tocopheryl acetate, polyquaternium-11 and mixturesthereof.
 13. The handcare/skincare product of claim 11, wherein saidcomposition is a ready to use composition.
 14. The handcare/skincareproduct of claim 11, wherein said composition is a structured liquidcomposition.
 15. The handcare/skincare product of claim 11, wherein saidcomposition is a water thin liquid composition.
 16. A method of reducingmicroorganisms on skin comprising; applying to said skin a non-aerosolfoaming antimicrobial composition comprising; a) a foaming agentcomprising a PEG-8 and/or PEG-10 linear dimethicone surfactant; b) a C₂to C₄ alcohol; c) a skin conditioner; and d) water
 17. The method ofclaim 13 wherein said skin is hand skin.
 18. The method of claim 13wherein said skin is facial skin.
 19. The method of claim 16 whereinsaid composition further comprises a skin conditioning agent.
 20. Themethod of claim 16 wherein said skin conditioning agent is selected fromthe group comprising: ethylhexylglycerin, hydroxyethylurea, urea,panthenol, glycerin, isopropyl myristate, propylene glycol, tocopherylacetate, polyquaternium-11 and mixtures thereof.